Tips for Working with Project Base Points and Survey Points

Consider the following when working with project base points and survey points:

• To ensure accuracy of the model, be sure the model geometry is less than 20 miles from the startup location of the project base point. To check this measurement:
  1. Use Move to Startup Location from the context menu to move the project base point back to its startup location.
  2. Use the Measure tool on the Modify tab to measure the distance from the project base point to the model geometry.
  3. If the distance is more than 20 miles, move the model geometry within 20 miles of the startup location of the project base point.
• Before you export a building site to a civil engineering application that accepts ADSK files, such as Civil 3D:
  1. Move the unclipped survey point to the location agreed upon with the civil engineer.
  2. Use the Specify Coordinates at a Point tool or enter the coordinates on the Site tab of the Building Site Export dialog, using the coordinates provided by the civil engineer.
• To ensure that an imported DWG site is positioned correctly in the project:
  1. Using the coordinates you received from the civil engineer, specify the coordinates of the survey point.
  2. Specify the correct angle for True North.
  3. Specify Positioning-Auto by Shared Coordinates to link the DWG file.